649577887 has 8 divisors (see below), whose sum is σ = 742654976. Its totient is φ = 556570872.

The previous prime is 649577881. The next prime is 649577963. The reversal of 649577887 is 788775946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649577887 - 2³ = 649577879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649577881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4138 + ... + 36280.

It is an arithmetic number, because the mean of its divisors is an integer number (92831872).

Almost surely, 2^649577887 is an apocalyptic number.

649577887 is a deficient number, since it is larger than the sum of its proper divisors (93077089).

649577887 is a wasteful number, since it uses less digits than its factorization.

649577887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35037.

The product of its digits is 23708160, while the sum is 61.

The square root of 649577887 is about 25486.8179065179. The cubic root of 649577887 is about 866.0515515113.

The spelling of 649577887 in words is "six hundred forty-nine million, five hundred seventy-seven thousand, eight hundred eighty-seven".